Malicious PDF — malware analysis report

Static analysis result for SHA-256 35c0035fdad93017…

MALICIOUS

PDF

44.9 KB Created: 2020-08-11 13:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8e07a6ee987a00ecda3dd76b4ce2cbf SHA-1: d861b31404e892a354bce61657c747b95cbdbeb2 SHA-256: 35c0035fdad93017d5b7c46791bd1d3d99a8e2c73cf21420487f475db8343549
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though partially corrupted, contains the URL that leads to the redirector. This suggests a phishing or scam attempt where the user is enticed to click the link, leading them to malicious infrastructure.

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=definition+of+leadership+pdf+2020
    • http://wegolep.firstunitedpc.org/uploads/1/3/2/8/132814930/2405644.pdf
    • http://nuber.samuelfamilylaw.co.uk/uploads/1/3/2/6/132681670/vabevapulinu.pdf
    • http://files.antengineering.com.au/uploads/1/3/2/8/132815003/mamadijofib.pdf
    • https://cdn.shopify.com/s/files/1/0428/8276/0870/files/97111632536.pdf
    • https://cdn.shopify.com/s/files/1/0434/4443/7144/files/85258920118.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/atom_zombie_smasher.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1520/files/lurogemugesep.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6896/files/fujofiwomudikogagasote.pdf
    • https://cdn.shopify.com/s/files/1/0431/2432/6566/files/php_vs_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0432/9114/8444/files/52240361100.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/cara_membuat_cv_dengan_format.pdf
    • https://cdn.shopify.com/s/files/1/0433/8876/4316/files/94215785012.pdf
    • https://cdn.shopify.com/s/files/1/0435/3291/0751/files/kikelutomeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/8521/7436/files/apush_textbook_online.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/vulizexol.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3586/files/zujol.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000640a.bin
348587a2af3820651ddfbd0bb348aa7473eb844e9c85375161d8034cc9d87bb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640A 5192 bytes
font_01_sfnt_off000075a3.bin
91cbef03685cb49abe8b4c94aaebc48adb9f6941415d05681e36a03f227750a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A3 10200 bytes
font_02_sfnt_off00009886.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9886 4324 bytes

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