Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf348669dcf02d48…

MALICIOUS

PDF

65.2 KB Created: 2020-08-28 13:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c3c2d5ce595b60e3f96a5a711aa494f6 SHA-1: b92dd2570e5a69244a310bfa6ebbedf152c9402a SHA-256: bf348669dcf02d488d4f2c60bbd2ac6de20afbd3b1585d7078376673d856e470
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.link/pify?keyword=is+pygame+a+seperate+download`. Additionally, it exhibits characteristics of a PDF link farm, containing numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same question about Pygame and the malicious URL, suggesting a lure to drive traffic to potentially malicious content.

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.link/pify?keyword=is+pygame+a+seperate+download In PDF document text
    • http://gotifikep.mrestrella.com/uploads/1/3/2/3/132303374/e87403.pdfIn PDF document text
    • http://files.naomiwahls.com/uploads/1/3/2/6/132695258/95be472eb0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/72883947700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/gastroenteritis_aguda_bacteriana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2766/8890/files/kewofepegan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9275/5111/files/pipuxolipebeki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5018/0503/files/33764536876.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7482/2043/files/vuxesipimegoziri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7790/1214/files/36488607831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/bloody_roar_2_game_mobile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/the_walking_dead_season_2_episode_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7590/2363/files/constitution_usa_video_guide.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA99A 5148 bytes
SHA-256: 6285ff7565917b279c87fa3c39637d2ecc90036a06db51fbf9360803ca4a34d7
font_01_sfnt_off0000bb15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB15 15100 bytes
SHA-256: f2ecde2831b30931af2ca7383bf5e8fc22e15a84f3af71e3a31d46396749d974
font_02_sfnt_off0000e991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE991 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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