Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab2ddde05850b3c…

MALICIOUS

PDF

53.7 KB Created: 2020-07-10 20:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe5cb88d23bce2c3fa56bf408f3830e3 SHA-1: ae981ef6588bcb125b5f86466656786e737a08e9 SHA-256: 5ab2ddde05850b3c015d4a8296c8b8dee26175a540a45d610d97bc5114d2ec42
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs designed to create a link farm, likely for SEO poisoning. One critical heuristic identified a link to known malicious redirector infrastructure, indicating a malicious intent to redirect users to harmful sites. The document body, while containing garbled text, also includes URLs that are part of this link farm, reinforcing the malicious redirection and SEO poisoning attack pattern.

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/wb?keyword=lista%20de%20referencia%20bradesco%20saude%20empresarial%20rede%20nacional%20pdf
    • http://files.limitlessyourlife.com/uploads/1/3/2/7/132710638/ecd0d.pdf
    • http://files.jasminkwan.com/uploads/1/3/1/4/131453248/kubomerebamel.pdf
    • http://files.bullengarookadultriders.com/uploads/1/3/2/6/132681596/fomapofegaro-wopigadazodup-zevevamer-tirexilagenizo.pdf
    • http://files.rachelmillercalligraphy.com/uploads/1/3/0/8/130813799/vetibikavogumiru.pdf
    • http://files.kaihongart.com/uploads/1/3/2/6/132695668/9b6a98b0.pdf
    • http://files.thehulahut.ca/uploads/1/3/2/6/132695489/386a4086ea0d7.pdf
    • http://files.nodawayvalleyffa.org/uploads/1/3/1/4/131438718/8996856.pdf
    • http://files.okraa.org/uploads/1/3/2/3/132303020/benejodiva.pdf
    • http://files.ittakestworealestate.com.au/uploads/1/3/1/3/131378932/2668602.pdf
    • http://files.newawakeningofthechurch.com/uploads/1/3/0/8/130873820/6050945.pdf
    • http://files.bigoakfarms.net/uploads/1/3/2/7/132740779/3837921.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://legeliwabuki.files.wordpress.com/2020/07/ridujekidufenijotorowijuz.pdf
    • https://wofopisuf.files.wordpress.com/2020/07/bipukotimidavutup.pdf
    • https://kovimaj.files.wordpress.com/2020/06/26377976721.pdf
    • https://gefoguvokuru.files.wordpress.com/2020/06/ralexiguvumogakufefaxowol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50398535586.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/73292489778.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nemevisofopanufu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7236632937.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27482348981.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/vababoparaneba.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fad.bin
5e9680c5740c74188cb7757c972a73458f9ccd80428a67128420a50d2bde2507		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAD 5264 bytes
font_01_sfnt_off00009161.bin
778184e0fd02a4e1642900c10f0b44eb55ec6fc679632245118180385765aa33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9161 18500 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.