Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae535d9bce32fa9…

MALICIOUS

PDF

34.5 KB Created: 2020-10-24 10:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 688bff54dbe4c5c5be83826751b3bf20 SHA-1: 13e61c7ef180cbba28a94d9f955a76b2e4d51d6d SHA-256: cae535d9bce32fa90650af646d8851de7833e77104033bf50db922889c7af540
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs, with one identified as a malicious redirector. The document body, though partially obfuscated, includes text suggesting it is a service manual, likely a lure to encourage clicks. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm or SEO poisoning tactic to improve the ranking of the malicious redirector. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 3

  • 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.
  • 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.club/123?keyword=piper+comanche+250+service+manual
    • https://cdn-cms.f-static.net/uploads/4374520/normal_5f8ea1978fe10.pdf
    • https://cdn-cms.f-static.net/uploads/4380871/normal_5f8f6608ef6bc.pdf
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5f8b7a9be9891.pdf
    • https://cdn-cms.f-static.net/uploads/4375361/normal_5f8a47b64b646.pdf
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/3870440.pdf
    • https://rixokofumi.weebly.com/uploads/1/3/1/3/131380985/654a2.pdf
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/096fc46624a1.pdf
    • https://fanavepuru.weebly.com/uploads/1/3/1/8/131871984/gadelubimiwiziwuzel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e293bcbc-feb4-4e61-afd8-75026c9187ef/kejununakanesupazareme.pdf
    • https://uploads.strikinglycdn.com/files/fc7bc63a-d786-46ae-a30f-99d728b6fcfe/58451033607.pdf
    • https://uploads.strikinglycdn.com/files/d6be7b94-1238-4cf1-9a63-d7b2de2081f1/cuadro_comparativo_de_democracia_y_autoritarismo.pdf
    • https://s3.amazonaws.com/henghuili-files2/guide_pour_apprendre_le_franais.pdf
    • https://s3.amazonaws.com/biwuwukesazef/effects_of_weeds_on_crop_production.pdf
    • https://s3.amazonaws.com/dowavelaxam/kowokaxepokigevifa.pdf
    • https://s3.amazonaws.com/xanebavifamopez/usa_anthem_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0492/2372/9318/files/nikki_sixx_mom_died.pdf
    • https://cdn.shopify.com/s/files/1/0497/9163/1509/files/fire_retardant_clothing.pdf
    • https://cdn.shopify.com/s/files/1/0494/6074/0263/files/ibuypower_best_buy_warranty.pdf
    • https://cdn.shopify.com/s/files/1/0428/8076/2023/files/crane_humidifier_user_guide.pdf
    • https://s3.amazonaws.com/jotizifime/83372649268.pdf
    • https://s3.amazonaws.com/dinisemowoge/72710810210.pdf
    • https://s3.amazonaws.com/julaxel/36448606483.pdf
    • https://s3.amazonaws.com/votubukaxogilix/bifoxa.pdf
    • https://s3.amazonaws.com/gupuso/xibirozavode.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bd0.bin
0253c3783ee8dab047d1c798dc3518ee5072c3b54fda5d74761db7e7292a9fd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD0 5436 bytes