Malicious PDF — malware analysis report

Static analysis result for SHA-256 73eb423c82500e7d…

MALICIOUS

PDF

40.7 KB Created: 2020-08-04 03:13:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b97bbe28363d37d22a5961e24396e8b SHA-1: 2de595f9c3ae9c8780584a7536db6deec17146cd SHA-256: 73eb423c82500e7dd32cf823f8f364fb681fc99cb7d7ed3dd54229f418335b51
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious due to its inclusion of a large number of external links, forming a link farm. One of the primary links directs to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=manfaat+binahong+pdf'. The document body, though heavily obfuscated, contains references to this URL and other PDF files hosted on Shopify, suggesting a tactic to drive traffic to malicious sites.

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=manfaat+binahong+pdf
    • http://files.rogger.net/uploads/1/3/2/3/132303314/rasimiv.pdf
    • http://files.bostwickcookieco.com/uploads/1/3/1/0/131071037/nexaxukelo.pdf
    • http://files.sandiego173rdairborne.org/uploads/1/3/1/3/131380627/6856790.pdf
    • http://files.3rddaygrowers.com/uploads/1/3/1/8/131872273/zekoka-zerorev-rosomorobufiviw-mozumejaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7677/1224/files/box_shadow_top_only.pdf
    • https://cdn.shopify.com/s/files/1/0427/6997/3415/files/talozimapagimejorizasexa.pdf
    • https://cdn.shopify.com/s/files/1/0441/0081/2952/files/descriptive_writing_format.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mofofuledezenededur.pdf
    • https://cdn.shopify.com/s/files/1/0437/7962/1026/files/wakuxijexilumusibisum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94260126358.pdf
    • https://cdn.shopify.com/s/files/1/0437/5805/9671/files/warframe_cetus_bounty.pdf
    • https://cdn.shopify.com/s/files/1/0431/5961/7690/files/wizurukejidepetajagij.pdf
    • https://cdn.shopify.com/s/files/1/0436/0211/6772/files/91528559642.pdf
    • https://cdn.shopify.com/s/files/1/0429/6078/1465/files/jitirol.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1560/files/65963196638.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/reba_full_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0432/6762/1028/files/77189209204.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_off00006229.bin
24bbc89ad48df8859527cc0fab6eda532d9dbcbeae3bed93697dddb5be1e6e58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6229 5140 bytes
font_01_sfnt_off000073b3.bin
f616891f8330f0251838b0031151512db3d0eaad4ed39d64a2218f2bdfd9a761		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B3 10024 bytes

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