Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed60e4bebe1adc7…

MALICIOUS

PDF

52.2 KB Created: 2020-09-09 18:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4087e20f4607399813482f6008d4676 SHA-1: 992e8e4ffb445efd539db3aadf01f9042ab46038 SHA-256: 1ed60e4bebe1adc72e3fca26f1206cf465f4f512c8d943123cffe38862825581
152 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, identified as a link farm, designed to redirect users to malicious sites. One prominent link, 'https://ttraff.link/wix?keyword=seven+elements+that+form+diatomic+molecules', is flagged as a malicious redirector. The document body, though partially corrupted, contains text related to chemistry, likely serving as a lure. The ML classifier strongly indicated maliciousness.

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.link/wix?keyword=seven+elements+that+form+diatomic+molecules
    • http://suvep.allsaintsmickleover.org.uk/uploads/1/3/0/7/130776677/b5ff94796be8d.pdf
    • http://xutape.iius.org.hk/uploads/1/3/1/6/131607163/4743ecb14dd.pdf
    • http://files.trytank.org/uploads/1/3/0/7/130775762/82ca3499d75479.pdf
    • http://files.amanapopcornandicecream.com/uploads/1/3/1/6/131637763/wuritogetojomozeju.pdf
    • http://lidul.vacationspecialdeals.com/uploads/1/3/1/1/131164239/pazitevotav-xutixatubej.pdf
    • http://powiji.centralrefrigerationinc.us/uploads/1/3/1/4/131483167/a81d0.pdf
    • http://files.corinnecook.me/uploads/1/3/1/8/131856212/029771.pdf
    • https://cdn.shopify.com/s/files/1/0433/5229/3541/files/ptcb_exam_study_guide_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4650/files/69406093925.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/gezebebizosexegekaxaxizo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1354/files/dosebobi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1463/5165/files/pufiroteluzifazese.pdf
    • https://cdn.shopify.com/s/files/1/0431/2766/8890/files/fodusagodopotunujov.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_off00008c4b.bin
c323abfb5148caf0282b4c3a57eea88703da91ae8243e078e0af93d412851005
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C4B 5424 bytes
font_01_sfnt_off00009e98.bin
02bad31d92f72894beebe0e6fca6507835d015ffec2881568ed9c7515c73b001
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E98 10956 bytes