Malicious PDF — malware analysis report

Static analysis result for SHA-256 b77262b8b8720817…

MALICIOUS

PDF

53.0 KB Created: 2020-08-18 15:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1960cebd44ceb2e6eaa8da19792cf49 SHA-1: 235085e01e8e7257eda08af64cbe1e55f513e607 SHA-256: b77262b8b8720817984d16c3a4251a503fe07d63d9d1066b7f40727085732951
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. The presence of numerous links, including the malicious redirector at https://ttraff.ru/pify?keyword=bts+world+game+apk, suggests the document's primary purpose is to redirect users to potentially harmful content. No scripts were extracted, limiting the analysis of further execution chains.

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.ru/pify?keyword=bts+world+game+apk
    • http://files.nutritionrites.com/uploads/1/3/0/7/130739615/9ae7740f4f689a.pdf
    • http://jipavilul.rumorhasitvt.com/uploads/1/3/1/8/131856158/1dc8ee52.pdf
    • http://files.courtneykanigphotography.com/uploads/1/3/1/8/131872105/e2ec0d.pdf
    • http://files.onebarefootgirl.com/uploads/1/3/0/7/130738531/8601937.pdf
    • https://cdn.shopify.com/s/files/1/0433/2657/0664/files/netgear_wn_3000_rp_setup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dosoxuwananeworatimuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/0630/4153/files/anselm_grun_books.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8330/files/zuwaparosuwelalajibej.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5359/files/99090248874.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/zanapojezuvepiwawow.pdf
    • https://cdn.shopify.com/s/files/1/0437/0405/8010/files/65955127905.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1518/files/nutrisystem_grocery_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/2499/0887/files/wosabedu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0499/2408/files/wii_u_console_black_friday_2016.pdf
    • https://cdn.shopify.com/s/files/1/0435/3694/1215/files/dabogedoro.pdf
    • https://cdn.shopify.com/s/files/1/0441/1126/5944/files/subsistence_economy.pdf
    • https://cdn.shopify.com/s/files/1/0433/8280/0542/files/jojezim.pdf
    • https://cdn.shopify.com/s/files/1/0435/3540/1111/files/customer_centricity_definition.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000699b.bin
a055be898eb76f7a1906ec7aa35df7ada0150bff6416ea45b9fa5c345620601e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x699B 5092 bytes
font_01_sfnt_off00007b6d.bin
a067ab23b54e84168802f65e27753ad9222e3b30cda2030f39c71fb457c20ae7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6D 5484 bytes
font_02_sfnt_off00008e11.bin
20f11e8c03a6d40f275f8d731c8b903840a08f2a67a096a455ad25e837d7975d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E11 10360 bytes
font_03_sfnt_off0000b1aa.bin
d78d7cc1a68daa951b4fbccbcfb906d5a08ad384f187125596154666a45abe72		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1AA 16060 bytes

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