Malicious PDF — malware analysis report

Static analysis result for SHA-256 3821756994826dce…

MALICIOUS

PDF

41.8 KB Created: 2020-08-26 11:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14546808f92e09f0acdbf998a49a51af SHA-1: ead82e887622b2926dfc9dd74617f3e90b820f08 SHA-256: 3821756994826dced5563fa2caa3384957849392f0b8a69150e82e08f93e9115
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.me/pify?keyword=big+jet+plane+meaning. The document body contains garbled text along with several URLs, suggesting it is designed to lure users into clicking malicious links, likely for a phishing or scam campaign.

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.me/pify?keyword=big+jet+plane+meaning
    • http://files.merrysny.shop/uploads/1/3/1/4/131454503/kiwebaf_bopipifavetut_gagibav.pdf
    • http://files.seanhancocklive.com/uploads/1/3/1/4/131437532/3135269.pdf
    • http://files.boonvillemusic.com/uploads/1/3/1/4/131410009/febudalogunidu.pdf
    • http://povobo.iaclals.com/uploads/1/3/1/0/131069921/b0ae3ae8bcc9da.pdf
    • http://kimijug.gabeeyrich.com/uploads/1/3/0/8/130873927/6351086.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/1997/files/difference_between_baseband_and_bandpass_signal.pdf
    • https://cdn.shopify.com/s/files/1/0431/3464/8482/files/41067982810.pdf
    • https://cdn.shopify.com/s/files/1/0434/0331/3308/files/atomistique_s1_smpc.pdf
    • https://cdn.shopify.com/s/files/1/0449/9125/0590/files/bhagavath_geetha_tamil_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/33724386596.pdf
    • https://cdn.shopify.com/s/files/1/0439/4716/3806/files/best_in_slot.pdf
    • https://cdn.shopify.com/s/files/1/0463/3110/1346/files/matlab_offline_installer_free_downlo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0802/3966/files/understanding_symbolic_logic_5e.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/ordinal_numbers_1-_100.pdf
    • https://cdn.shopify.com/s/files/1/0432/7551/8107/files/accurate_english_pronunciation.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_off000065ef.bin
b0fa58f81ae2fb31b09420c9aad5a785923e388a30704320352506d5ec9f305f
pdf-font-stream PDF embedded font (sfnt) at offset 0x65EF 4992 bytes
font_01_sfnt_off000076dd.bin
c09bfdf888fdd5c7d54a43d4520d9f8e775c08072cd742e31f00d6a3f6d45aa5
pdf-font-stream PDF embedded font (sfnt) at offset 0x76DD 10380 bytes