Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb5061017ed7a5b5…

MALICIOUS

PDF

131.3 KB Created: 2020-08-11 22:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dce749b8ec65878b7006f62e50d0b836 SHA-1: 82c848d336389435a30df843acdb2be03991fa5c SHA-256: fb5061017ed7a5b5cb6ef981ea01cb75370cc034f27c6bdb3f689280bdd963e8
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=analogies+reasoning+pdf'. This URL is embedded within the document body, suggesting a social engineering lure. The presence of numerous other Shopify URLs, while marked as benign, indicates a link farm strategy. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be directing the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=analogies+reasoning+pdf
    • http://joxop.831.delivery/uploads/1/3/1/3/131383483/muluzimowaxeve.pdf
    • http://files.gracewinchester.com/uploads/1/3/2/6/132695620/winikovoxux_xatebixodifiga_jutuzoloxuzejo.pdf
    • http://files.hsm-missions.com/uploads/1/3/0/7/130776142/pifemokoxeju_duvezuwirafed_tazuv.pdf
    • http://files.hollistonxctf.com/uploads/1/3/0/7/130739970/mebumegivi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/joxukeminadika.pdf
    • https://cdn.shopify.com/s/files/1/0433/3223/9528/files/vixivezevipuva.pdf
    • https://cdn.shopify.com/s/files/1/0437/2509/5062/files/buwegejegekulikuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/9938/2170/files/bible_download_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0428/1873/2191/files/92349211563.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1520/files/larevufa.pdf
    • https://cdn.shopify.com/s/files/1/0438/3545/7696/files/vesejubimul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85986419962.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/360243816.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/7144095448.pdf
    • https://cdn.shopify.com/s/files/1/0431/5398/1594/files/sakejaxuzowefoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/3430/3912/files/dizab.pdf
    • https://cdn.shopify.com/s/files/1/0428/8181/0595/files/getopukawomukakopojeka.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/blue_book_of_grammar_and_punctuation.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b393.bin
88fcfbfb62d36cec8edd7ee45e0752bbc41a8e41cd89f0a0e5204cb1993f46a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B393 5200 bytes
font_01_sfnt_off0001c54a.bin
8ece77bf5cecbfc86cd6fe7aaa2c2605478e82a4a57c850de2e4ac8c68bc39f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C54A 10684 bytes
font_02_sfnt_off0001e942.bin
f3600a2162815bec456b8ea634e013312c0e00ce15a5e8c187cdcbfe7a1e435d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E942 16248 bytes

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