Malicious PDF — malware analysis report

Static analysis result for SHA-256 052a625a89d36f02…

MALICIOUS

PDF

46.0 KB Created: 2020-08-12 16:51:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36025a2a66ba0a1aae3330f86e3f8f59 SHA-1: 5db5c2be0b45220dd42d9191c6a3598efcbf3a1b SHA-256: 052a625a89d36f026052d015a77390d43bc21bebe2bd5a09eb734d789163e6d0
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=human+psychology+in+telugu+pdf+download'. This redirector likely leads to a phishing page or malware download. The document body also contains embedded URLs that are part of a link farm, suggesting an attempt to manipulate search engine results or distribute content through a network of compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=human+psychology+in+telugu+pdf+download
    • http://files.emilywahlgallery.com/uploads/1/3/2/6/132695830/rojukanilumom.pdf
    • http://files.headofeng.com/uploads/1/3/1/6/131637679/peledowakud_sabepeganegewa.pdf
    • http://kifuma.eternal-roots.com/uploads/1/3/1/1/131164250/5689bb6d.pdf
    • http://files.completecirclecounselingcoaching.com/uploads/1/3/1/4/131411199/dedibikakaxox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2650/5128/files/zakobifivok.pdf
    • https://cdn.shopify.com/s/files/1/0439/8632/1566/files/kebozufifexofikiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/6385/9610/files/70638718742.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xodowowesibaxen.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9461/files/magisterio_de_la_iglesia_catolica.pdf
    • https://cdn.shopify.com/s/files/1/0434/3414/7989/files/pemumefijobogogi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2286/0956/files/60231023974.pdf
    • https://cdn.shopify.com/s/files/1/0427/9674/4871/files/gikutaleve.pdf
    • https://cdn.shopify.com/s/files/1/0433/8489/7701/files/mivinidapogitolid.pdf
    • https://cdn.shopify.com/s/files/1/0432/1850/1799/files/yasin_dan_latin.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/10130083588.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/morph_mod_for_1._8.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005663.bin
9d9daf711ba1358ad9a95a22c02737860ff54cf6e61cfa69e91e10dec06163b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5663 5628 bytes
font_01_sfnt_off00006966.bin
8db65adc699bed2ed4e99b174e414cace916d9ae25f4e5597e3d94de4d1667c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6966 2116 bytes
font_02_sfnt_off0000730d.bin
40f467fffef7169271ba53556222a11e0926082ab750c3b170fc510812d62eed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x730D 9880 bytes
font_03_sfnt_off0000951a.bin
9ffc405fbed68b1ed35cf25504b2a045b5802e2074cf99e6920a228075e829fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x951A 16160 bytes

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