Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7480a17eb7765ff…

MALICIOUS

PDF

45.9 KB Created: 2020-08-02 21:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f05a3321945d13080f790d6ba799e2d4 SHA-1: 2479a4d8c8cf5a8f69db4112d24733cd7d3b98b7 SHA-256: e7480a17eb7765ffc89bf03ab959a98f9d443194a5d51bcfe39c5201f50322b6
152 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier as malicious and contains a high density of embedded links. One of these links, https://ttraff.com/pify?keyword=appliance+factory+parts, points to known malicious redirector infrastructure. The document body contains garbled text, suggesting it is not intended for human consumption but rather as a lure for the embedded links.

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.com/pify?keyword=appliance+factory+parts
    • http://files.saintjosephsuites.com/uploads/1/3/1/3/131383771/wevase.pdf
    • http://files.thadaltman.com/uploads/1/3/1/8/131860645/zodugam_mirosofiveb.pdf
    • http://files.mrsberthaosclassroom.com/uploads/1/3/0/7/130740264/d3b77554683.pdf
    • http://files.southernplainsphotography.com/uploads/1/3/0/8/130874671/lofabojesemopuro.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7649/files/jetonidatatisefoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0099/files/sam_feldt_show_me_love.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7916/files/actor_release_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42262915950.pdf
    • https://cdn.shopify.com/s/files/1/0438/8634/6408/files/wujuturufumasikagomenas.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0730/files/suwodupilavetosoluzakenef.pdf
    • https://cdn.shopify.com/s/files/1/0433/9800/4899/files/faxusakagivodenelowoti.pdf
    • https://cdn.shopify.com/s/files/1/0432/3164/1762/files/12163955951.pdf
    • https://cdn.shopify.com/s/files/1/0432/4478/1735/files/61416950001.pdf
    • https://cdn.shopify.com/s/files/1/0430/2818/5239/files/10170434950.pdf
    • https://cdn.shopify.com/s/files/1/0432/3164/1762/files/junaxujikalarojozijunet.pdf
    • https://cdn.shopify.com/s/files/1/0432/6883/3436/files/ruvebelexobukazadaji.pdf
    • https://cdn.shopify.com/s/files/1/0436/0699/9203/files/tizij.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/bamaxila.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/renumimidak.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_off00007434.bin
ecd55d87d42e05144c7b7a7d770b78924ab168205c28a99af689a419e0da2197		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7434 5100 bytes
font_01_sfnt_off000085ae.bin
72b155916cfd33646f590ab400aeb92aa320fb5c08f09ce76034c04f87000b06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85AE 11064 bytes

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