Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc029a0f661fd06c…

MALICIOUS

PDF

117.5 KB Created: 2020-08-10 11:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d54edf8bea7271e03b6f3a4238baaa71 SHA-1: 8212f23083d0545900a38d421faa8894c41fd127 SHA-256: dc029a0f661fd06c2324ade7941bdfd506cfe9769d7123ee7f8849931a6038b2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=uttarakhand+map+pdf'. Additionally, another critical heuristic indicates a PDF link farm, suggesting an attempt to manipulate search engine results or distribute content broadly. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirect URL, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=uttarakhand+map+pdf
    • http://files.thebeanstalkproject.org/uploads/1/3/0/8/130874539/xibufajasixujegud.pdf
    • http://files.mgfundraiser.com/uploads/1/3/1/3/131382982/vulirezuti-koretuxeseg-leravilir-vofodenenumo.pdf
    • http://tizujasif.fullspectrumchiro.com/uploads/1/3/1/6/131607163/9019830.pdf
    • http://files.qualityhorsetraininggear.com/uploads/1/3/2/3/132302928/femetula.pdf
    • http://files.nathaniel-gaynor.com/uploads/1/3/1/4/131452944/3590561.pdf
    • https://cdn.shopify.com/s/files/1/0434/0691/7799/files/14645340716.pdf
    • https://cdn.shopify.com/s/files/1/0443/9041/6550/files/partitura_concierto_de_aranjuez_trompeta.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0432/files/julasulekivutemiju.pdf
    • https://cdn.shopify.com/s/files/1/0429/1801/9235/files/cost_behavior_patterns.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/66883413579.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/zaputu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4908/2264/files/63659547618.pdf
    • https://cdn.shopify.com/s/files/1/0434/7366/6213/files/pokilefefovozobabix.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/37049920115.pdf
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/basic_topology_armstrong_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0622/9654/files/9641274292.pdf
    • https://cdn.shopify.com/s/files/1/0428/1666/7815/files/employee_provident_fund_form.pdf
    • https://cdn.shopify.com/s/files/1/0438/2906/7933/files/pofagowexadumawezas.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013cfa.bin
2fa88ff67e617f2ace726074adc29e2e0aabaf2e5a7092151afe687fb60efcd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CFA 5128 bytes
font_01_sfnt_off00014e41.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E41 3720 bytes
font_02_sfnt_off000159a4.bin
de5ff8294680998ee21d0f1900a2898a4d46c2f9d6f5c39304139d93e41047bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x159A4 17064 bytes
font_03_sfnt_off00018da5.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18DA5 16164 bytes
font_04_sfnt_off0001a2f7.bin
3869d2a9347db1d2abf268ac57f9474eed0867ab5c2b5e9a6307d5ac01f6b769		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A2F7 10592 bytes

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