Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d79e960d9c4640…

MALICIOUS

PDF

44.0 KB Created: 2020-08-04 18:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a9a8f6b0180562925d654efbe9517ce SHA-1: 6c3876f5161e0aaccf096c0483e14af78b4de7b0 SHA-256: 88d79e960d9c46407fec933cafaf79e2724337daff47db8083e639d79fcdcc57
152 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.ru/pify?keyword=abnormal+lung+sounds+pdf. The presence of a large number of external PDF links, many hosted on cdn.shopify.com, suggests an attempt to manipulate search engine results or distribute malicious content through a seemingly benign platform. No scripts were extracted from this sample.

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=abnormal+lung+sounds+pdf
    • http://files.67writer.com/uploads/1/3/0/8/130874205/panodenire_ludazeveme_kuberi_gitakex.pdf
    • http://files.psstrings.com/uploads/1/3/0/7/130774977/4e305056f1dcd.pdf
    • http://files.elizabethkelleylaw.com/uploads/1/3/2/8/132814123/3113470.pdf
    • https://cdn.shopify.com/s/files/1/0435/5116/2517/files/lowes_port_orange.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96617946950.pdf
    • https://cdn.shopify.com/s/files/1/0449/1457/3467/files/encyclopdie_marvel_universe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruxejuvekega.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/kuvilanewajadunuwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1101/files/10007082967.pdf
    • https://cdn.shopify.com/s/files/1/0432/9376/9894/files/pobesurizovasuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/7900/7384/files/invertebrate_zoology_barnes_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/denikiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/6577/0133/files/rapatuwokiseguzoxaredited.pdf
    • https://cdn.shopify.com/s/files/1/0431/4277/4938/files/xalekukegukurizuxijebi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8572/5857/files/61140239698.pdf
    • https://cdn.shopify.com/s/files/1/0431/6987/4082/files/xovuxedi.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_off00006dd9.bin
744286645bc4e714111b552b79aab378ab09b1781e71765ba3cc0572e42f304c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD9 5492 bytes
font_01_sfnt_off00008066.bin
049f8aff7fef88b035b01b3fa8f6b04bb384eb4abafb39bd7f1beba0d223dcc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8066 10100 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.