Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2ab56dea4d4a4e…

MALICIOUS

PDF

75.7 KB Created: 2020-08-14 21:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebfa161b15becc2f5d2e5a027bd674a7 SHA-1: 27191173c22d77aab0819388e962be17ebe5ea4f SHA-256: 2c2ab56dea4d4a4eeb5d943d51817a2f2f0ef020358094d3dfcf88fc3676448a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. This URL is further obfuscated within the document body and is associated with a link farm designed for SEO manipulation. The presence of multiple embedded URLs, including those hosted on Shopify and other domains, suggests a broad distribution effort. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be tricking the user into clicking the malicious redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=automatic+call+recording+pro+apk+free
    • http://files.mksheatsteachingportfolio.com/uploads/1/3/0/7/130739490/64a0e5a89b178da.pdf
    • http://nowisepoz.benjamincoldsaxophone.com/uploads/1/3/1/6/131636612/a612964856fb71c.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/bopuwolafujipen.pdf
    • https://cdn.shopify.com/s/files/1/0435/2314/5896/files/thames_water_customer_assistance_fund_request_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/646255477.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7816/files/67476688072.pdf
    • https://cdn.shopify.com/s/files/1/0429/6350/1222/files/13907205553.pdf
    • https://cdn.shopify.com/s/files/1/0428/6054/4156/files/black_pipe_layers.pdf
    • https://cdn.shopify.com/s/files/1/0435/4310/1591/files/netgear_wpn_824.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/rawenibabaf.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5003/files/87343353573.pdf
    • https://cdn.shopify.com/s/files/1/0433/9721/8460/files/73870365581.pdf
    • https://cdn.shopify.com/s/files/1/0432/5172/8546/files/82709889985.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5901/files/bunty_aur_babli_film_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0431/1017/0786/files/bokixutemafavodikumisob.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 11

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_011_off0000e9d1.bin
e94ec5a57538b0da14e83632744a74302a7116edb3d1d82a7285aeeb5a30b2d8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE9D1 17364 bytes
font_00_sfnt_off00005c0f.bin
9ab128466a59ee797a873a4cf38f5e676158b59b163e2e8280f255dfba034668		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C0F 3680 bytes
font_01_sfnt_off0000695f.bin
b62427a199c89d3049dadcb5fbe4e4b6e2d8e4acee95a0081f3b58d12b2880f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x695F 5352 bytes
font_02_sfnt_off00007b74.bin
ff8289fcab20b7b81f5dc7c47458689637225d7099c48932a46d6898d6123f6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B74 2656 bytes
font_03_sfnt_off00008679.bin
39170b829f41299914f87902df23c51940c2e39beef9daeac0e447c9300bdbce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8679 4372 bytes
font_04_sfnt_off0000946a.bin
39aae2e28ce4d86a18e127f8da49358fe4d2479f0f07e6c6d1f281f213029a8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x946A 4692 bytes
font_05_sfnt_off0000a2a8.bin
5b8e8035f8940535bfb5f3d78de7d5c45dbc51c905faa5d9788b8fc152e96872		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2A8 3840 bytes
font_06_sfnt_off0000b0ae.bin
488ffee5e9c33bcc1f3f00aec749f35977d0cdd209ffadaee35194d66ecc177d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0AE 6148 bytes
font_07_sfnt_off0000c08e.bin
df2b5141fad5a9141903b2aeff524fa29a95b55dd51b395d15659220bbfc81e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC08E 13320 bytes
font_09_sfnt_off0001035e.bin
204f00cd683098fa676635ab5945e5df91852539cec2daa0f785be91a8165390		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1035E 3184 bytes
font_10_sfnt_off0001100b.bin
5cc8f364962355ae475115db944fd7a4d20f38d86c7f7c448382747ab212ad85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1100B 4216 bytes

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