Malicious PDF — malware analysis report

Static analysis result for SHA-256 42476ebfa1bd86b2…

MALICIOUS

PDF

51.0 KB Created: 2020-08-04 04:43:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 134a7b082ea8751227e59a97cd82715c SHA-1: 86905421e8dae014584f0d29a5136842bfa11ed8 SHA-256: 42476ebfa1bd86b20f7d5b6fc71d85b8987dcec95947ae1fbd155df2d73bc36e
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'scaled agile framework reference guide'. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple links to external PDFs, some hosted on potentially compromised Shopify domains, indicates a link farm or distribution mechanism. The primary attack vector appears to be directing users to malicious infrastructure via these links.

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.com/wb?keyword=scaled%20agile%20framework%20reference%20guide%20pdf
    • http://rugeku.freebiequeen13.net/uploads/1/3/0/7/130775062/004a953a59b5.pdf
    • http://xekuwos.c3classes.com/uploads/1/3/0/7/130740510/ratasa_zeniw.pdf
    • http://files.eliteladiesfashion.co.uk/uploads/1/3/0/7/130776536/ac058b1a.pdf
    • http://files.2skypattaya.com/uploads/1/3/0/7/130739340/rovelinat_tipatoxoxemu_mubulubitotil.pdf
    • https://cdn.shopify.com/s/files/1/0428/3006/9927/files/61277599686.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/13809483747.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/27885211706.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/filifuledodibirofugetix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92313200312.pdf
    • https://cdn.shopify.com/s/files/1/0430/7556/7770/files/bekadutel.pdf
    • https://cdn.shopify.com/s/files/1/0437/6385/9610/files/nefekow.pdf
    • https://cdn.shopify.com/s/files/1/0432/1250/5243/files/wazugamabajajufag.pdf
    • https://cdn.shopify.com/s/files/1/0431/6600/7445/files/vipug.pdf
    • https://cdn.shopify.com/s/files/1/0435/9982/3016/files/topanerasojalituxabopano.pdf
    • https://cdn.shopify.com/s/files/1/0438/0088/7457/files/zasevoja.pdf
    • https://cdn.shopify.com/s/files/1/0444/2878/7878/files/mkv_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90840236881.pdf
    • https://cdn.shopify.com/s/files/1/0431/6584/3620/files/weight_watchers_calculator.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_off00008528.bin
261e512244c46cf44dc0098f0cc8fa1175485f021e90013a39338a1749aa8427		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8528 5556 bytes
font_01_sfnt_off00009813.bin
adf2c10e953f49c076874c86d3ac0520053687086052e5e162b4684f98f62981		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9813 10944 bytes

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