Malicious PDF — malware analysis report

Static analysis result for SHA-256 81458d2f71a84fa5…

MALICIOUS

PDF

45.8 KB Created: 2020-08-20 03:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee264170620755d602d75cdaae54ec39 SHA-1: 3fd37518f1c322a5df39e2a8eb5ee7949e4ef066 SHA-256: 81458d2f71a84fa5d6ef9f90b7181342b6fbb5dbdbf2caa002a1cda3d6e05175
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=pokemon+new+gba+game+2017'. This URL is embedded within the document body, suggesting a lure to a potentially malicious site. The presence of a PDF link farm heuristic further indicates the document's intent to distribute links. While no scripts were extracted, the combination of the redirector and link farm heuristics strongly suggests a phishing or malware delivery attempt.

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.cc/pify?keyword=pokemon+new+gba+game+2017
    • http://files.nationalculturalheritagetourismcenter.com/uploads/1/3/1/3/131398542/54f407.pdf
    • http://files.eatyourheartoutsd.com/uploads/1/3/2/8/132814791/nasenarijapeve-bepuwaje-lemusaxo.pdf
    • http://gejuzisoz.hsband.bwmusic.net/uploads/1/3/2/6/132682467/sefijatovifedumi.pdf
    • http://files.threadpaint.com/uploads/1/3/0/8/130874422/2128282.pdf
    • http://nupagipuv.ourhiddenhills.ca/uploads/1/3/1/4/131437412/befodulutu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4686/9911/files/wufemezegi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0862/9659/files/zimafaridedomujelopaluj.pdf
    • https://cdn.shopify.com/s/files/1/0428/4756/8039/files/bepegivezasije.pdf
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/74713823597.pdf
    • https://cdn.shopify.com/s/files/1/0433/2650/5118/files/pusabigikiradoribopure.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/25145049565.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/liwisubusamepumiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/5220/3161/files/94409940292.pdf
    • https://cdn.shopify.com/s/files/1/0437/9289/2061/files/construction_business_plan_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/carlos_drummond_de_andrade_sentimento_do_mundo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.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_off00007414.bin
4060fbde46b53aab018aaab2183440c43c350b09de409474802aa04f497132f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7414 5404 bytes
font_01_sfnt_off0000868f.bin
0519d8f95dcba3f3df2c54a4a569a654da51e722ff37b3a049b089a8bcb5950b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x868F 10512 bytes

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