Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab2a207979314b4…

MALICIOUS

PDF

44.9 KB Created: 2020-08-08 13:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1d5926f644decab11b0af58faa44177 SHA-1: 6aff244924ed82d9f3cc150cbc7db5543b0a0061 SHA-256: 5ab2a207979314b4ce9f6689b5a218337738bdd3e3c59f17f5ce6a8522029b20
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which are designed to appear as legitimate PDF resources. These links ultimately redirect to a known malicious URL, 'https://ttraff.cc/pify?keyword=moment+area+method+pdf', indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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=moment+area+method+pdf
    • http://files.publichealthmuseum.org/uploads/1/3/1/3/131384789/a826b1b39.pdf
    • http://tatipe.woolacombesurflifesavingclub.org/uploads/1/3/1/0/131070420/nogoteberodob.pdf
    • http://files.disruptivenewyork.com/uploads/1/3/1/3/131379111/8785562.pdf
    • http://files.oneidcolumbus.org/uploads/1/3/1/8/131856827/9d0e80c727b33.pdf
    • http://files.hoffmanindustries.org/uploads/1/3/1/4/131413678/mubezifuder_wusagafulekane_bexapujukozuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6486/0575/files/52212440581.pdf
    • https://cdn.shopify.com/s/files/1/0438/4574/6848/files/john_deere_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/81043174309.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/bebagit.pdf
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/8775320406.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/escaped_alone_script.pdf
    • https://cdn.shopify.com/s/files/1/0439/1626/3592/files/38303988682.pdf
    • https://cdn.shopify.com/s/files/1/0448/0407/9777/files/acgih_exposure_limits.pdf
    • https://cdn.shopify.com/s/files/1/0433/6100/9829/files/53895311498.pdf
    • https://cdn.shopify.com/s/files/1/0429/4492/1766/files/pemiruxegiburonodeniz.pdf
    • https://cdn.shopify.com/s/files/1/0448/8429/5847/files/88864758611.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/microsoft_annual_report_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/7970/3451/files/voxamuzavurozavuwakibovak.pdf
    • https://cdn.shopify.com/s/files/1/0433/5891/2662/files/cancer_de_mama_definicion_oms.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/jonenasag.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006585.bin
d2690e42d710ce81ec6cda3a33957d97b828567dc1271f16548ea11660cf3afc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6585 4816 bytes
font_01_sfnt_off000075a9.bin
2323ab664dd1f2e0a10e5a010dddb7198eac8efd9c0ff1a42ee77a1e6315ce5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A9 10124 bytes
font_02_sfnt_off00009838.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9838 4324 bytes

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