Malicious PDF — malware analysis report

Static analysis result for SHA-256 1502512f84c4b742…

MALICIOUS

PDF

42.9 KB Created: 2020-08-10 01:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 900a24dcc937e35e20cd5f0bec92fd31 SHA-1: eda8a3d7280d9c351d1cb22d84439c0d1cc10d61 SHA-256: 1502512f84c4b742628a4e97ec91354cf668c7d4adfed6c18cd504084bbe9837
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many of which point to a redirector service, indicating a link farm or SEO poisoning attempt. The primary malicious URL identified is https://ttraff.cc/pify?keyword=symmetry+worksheets+pdf+grade+1, which is flagged as a malicious redirector. The document body, though heavily corrupted, contains text related to 'symmetry worksheets pdf grade 1', suggesting a lure to disguise the malicious intent. No scripts were extracted from this sample.

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=symmetry+worksheets+pdf+grade+1
    • http://files.autumnlala.com/uploads/1/3/0/8/130813369/4381066.pdf
    • http://files.beadvillechaska.com/uploads/1/3/0/8/130873829/5400236.pdf
    • http://defam.simplyhomeco.com/uploads/1/3/0/7/130776760/bibiro.pdf
    • http://fofapagof.danieleantoniella.com/uploads/1/3/1/4/131438641/javixufoselonuw-virafewo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/fobaxitoxirikujifabuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/9302/3133/files/zomigewojelewofuruluge.pdf
    • https://cdn.shopify.com/s/files/1/0433/3964/5093/files/98981770021.pdf
    • https://cdn.shopify.com/s/files/1/0430/5112/2842/files/90441596834.pdf
    • https://cdn.shopify.com/s/files/1/0437/1926/2357/files/87642021110.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8032/files/48853440387.pdf
    • https://cdn.shopify.com/s/files/1/0430/8104/0033/files/vlc_codec_pack.pdf
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/fezataledadapefukerikizow.pdf
    • https://cdn.shopify.com/s/files/1/0436/9406/3770/files/8178187756.pdf
    • https://cdn.shopify.com/s/files/1/0431/4782/1205/files/tenevafagotapixabotob.pdf
    • https://cdn.shopify.com/s/files/1/0444/2842/7431/files/austrian_embassy_visa_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/2698/0765/files/amiodarona_farmacologia.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/zojusoxawimexuveguzese.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_off000068b1.bin
3fe8f4d9ac15a138f5d8beea9448fd6650138bb39446390b5a109a31aa328f64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68B1 5836 bytes
font_01_sfnt_off00007c8e.bin
246a583f8bf9a1a2089c66cf3ab94f33b99fe778f31b02934205727a0627aef0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8E 10072 bytes

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