Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb012b775b20eb8…

MALICIOUS

PDF

42.4 KB Created: 2020-08-28 16:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f597cad0fcf0cbf7679e0995a1a7528 SHA-1: dc78a9a0b9e511755c0627fa334e6a2bf40d16ba SHA-256: 3eb012b775b20eb8dce304f05b2fd8220c82508f53dfc0d4b76b3407017064f5
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that leads to a link farm of other PDFs, indicating a phishing or redirection attempt. The ML classifier strongly flagged this PDF as malicious. The embedded URLs and the document body content suggest a lure to engage the user with a quiz, ultimately leading them to potentially harmful 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.com/pify?keyword=interpersonal+communication+quiz
    • http://ropena.marita-wild-cat.com/uploads/1/3/1/4/131437402/019cd.pdf
    • http://files.glanfield.org/uploads/1/3/0/8/130813804/fezidipisubuf.pdf
    • http://goleji.annawitte.org/uploads/1/3/0/7/130776367/48aa61.pdf
    • http://dirijitam.cozmoblack.com/uploads/1/3/1/1/131164097/sawifunumobiku_narubavuxa_nageru.pdf
    • https://cdn.shopify.com/s/files/1/0433/1569/1678/files/how_to_achieve_goals_in_life.pdf
    • https://cdn.shopify.com/s/files/1/0429/3584/5017/files/rufizowukeretigevi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2154/9217/files/anti_tank_guided_missile_nag.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3198/files/value_proposition_canvas_book.pdf
    • https://cdn.shopify.com/s/files/1/0446/9293/0716/files/22715609044.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jewepogepavab.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7238/files/wixofojenemesumemupumuma.pdf
    • https://cdn.shopify.com/s/files/1/0433/7644/3543/files/gevemawujibaga.pdf
    • https://cdn.shopify.com/s/files/1/0439/2363/6379/files/organic_chemistry_aromatic_compounds.pdf
    • https://cdn.shopify.com/s/files/1/0434/2215/4908/files/2944865893.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_off000069cc.bin
2ee946cd5582096ad69c0ba673f7d0a7183957bd59f98836b13fb62f979581ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x69CC 5192 bytes
font_01_sfnt_off00007b5c.bin
949fc685dcac749836ba6cc443ec3c7d0ba661eabd8569971490713bd62b1db6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5C 9824 bytes