Malicious PDF — malware analysis report

Static analysis result for SHA-256 445b6b03720e16ee…

MALICIOUS

PDF

41.5 KB Created: 2020-08-12 03:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1b1c5bf14d9a505386f3e5e6ea25ff3 SHA-1: ad9cb71b85ab71c18c0d218b95978ddc2fb79ef1 SHA-256: 445b6b03720e16eef484035a30f1d1f34df6397cef0b7f1be6d9d024a4bbb9c5
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The primary redirect URL is https://ttraff.cc/pify?keyword=aspects+in+astrology+pdf, which likely leads to a malicious payload or phishing page. The document body itself is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, a tool often abused for malicious purposes.

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=aspects+in+astrology+pdf
    • http://files.centralmarylandweather.com/uploads/1/3/1/0/131070918/zikuma-lavana-mologoxebinolum-rodijefug.pdf
    • http://files.thunderbayaudubon.com/uploads/1/3/1/3/131381607/lopuzanoresix_fisegil_disad.pdf
    • http://files.artofmccabe.com/uploads/1/3/0/7/130738639/5570940.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3507/files/2706748864.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9303/files/zizupofiluju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/test_1879eb6a-339e-4d45-a409-571cd94a4742.pdf?v=1594212285
    • https://cdn.shopify.com/s/files/1/0431/6063/3504/files/vaxisejisazafu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1028/3931/files/mecanismo_de_accion_aines.pdf
    • https://cdn.shopify.com/s/files/1/0432/5684/0350/files/kirumolaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/4180/0860/files/51847598904.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/betevoruxogesifolaxupox.pdf
    • https://cdn.shopify.com/s/files/1/0436/8223/4521/files/zazojogenezuragosokoko.pdf
    • https://cdn.shopify.com/s/files/1/0430/0544/4259/files/calliandra_calothyrsus.pdf
    • https://cdn.shopify.com/s/files/1/0429/9328/7321/files/lipajedemuvegedixuluxe.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2130/files/adobe_illustrator_to_dwg.pdf
    • https://cdn.shopify.com/s/files/1/0429/3050/3843/files/69456600704.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000650a.bin
25b0246b529b2982a62b99d24266504534115f04260db705e8ff3120af08e860		 pdf-font-stream PDF embedded font (sfnt) at offset 0x650A 5416 bytes
font_01_sfnt_off0000777c.bin
bac58f3d679e7bf9976661da9a6e3af1d84aa8ac6ada9aac33c88770b16bb0a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x777C 9832 bytes

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