Malicious PDF — malware analysis report

Static analysis result for SHA-256 7913803cab799e9e…

MALICIOUS

PDF

54.4 KB Created: 2020-09-09 21:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd965466254566bf4eb75a2b13121449 SHA-1: 130ffaeff1e37d863a1a4db3bab4cc3b7ac8fa36 SHA-256: 7913803cab799e9ec5f81919de26ab26d49142ddb37253a060dd46624c7e898c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded links, many of which point to a redirector infrastructure. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's purpose is to trick users into financial fraud. The primary malicious URL identified is https://ttraff.me/pify?keyword=wafer+paper+vs+sugar+sheets, which is also flagged as a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.me/pify?keyword=wafer+paper+vs+sugar+sheets
    • http://files.learningmanager.ro/uploads/1/3/1/4/131408209/4a1111ad3e.pdf
    • http://perogug.gabgains.com/uploads/1/3/0/8/130874063/bukazivo_dowurimikemeja_wekojajuvi_fejidibemoj.pdf
    • http://voxexed.goodatlooking.com/uploads/1/3/1/4/131407226/lumumere.pdf
    • http://files.cultivacultura.com/uploads/1/3/1/4/131453684/dejusakak-tijixaz.pdf
    • http://files.colton-craig.com/uploads/1/3/1/3/131383737/kajawaduma.pdf
    • http://zazazurul.cwmdigitacollections.com/uploads/1/3/0/7/130739344/7f83f9dbca.pdf
    • http://banavew.emmettgallagher.com/uploads/1/3/1/3/131380213/dozosidozizeta.pdf
    • http://files.victoria13gla.ca/uploads/1/3/0/7/130776060/rutedigasefo_ripekinal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/2646/5436/files/93771279256.pdf
    • https://cdn.shopify.com/s/files/1/0432/2181/1362/files/1990668549.pdf
    • https://cdn.shopify.com/s/files/1/0434/5472/6310/files/75967499250.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4833/files/83900640043.pdf
    • https://static.usrfiles.com/ugd/3b47cb_35d8da0db2234a8a9c6fe4bc12263573.pdf
    • https://static.usrfiles.com/ugd/111c46_96dd86d446b243c4bc150054211b3f12.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_352f1ec0882e464bb98a057c6d4d9c64.pdf
    • https://static.usrfiles.com/ugd/5de1df_308de161d51c424e8e0809e956f77ab5.pdf
    • https://static.usrfiles.com/ugd/fb41f9_342de718944f4b988ed2db88d72fac88.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_off0000897d.bin
7af74c019751b2d7d168d36aca81b08d558c3708ea56c6e2184ae88063872929		 pdf-font-stream PDF embedded font (sfnt) at offset 0x897D 4824 bytes
font_01_sfnt_off00009a0e.bin
94d458a589d978a12e78a9649ef2a497ada94626d6f9c5b26ccf7f2b6e891832		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A0E 10624 bytes
font_02_sfnt_off0000be46.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE46 4324 bytes

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