Malicious PDF — malware analysis report

Static analysis result for SHA-256 d120e807c7d22949…

MALICIOUS

PDF

68.3 KB Created: 2020-08-10 12:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d01371fa520ff34eeb1ae3e5b3c174d SHA-1: 08dace31355f1a0bdb921215d2d06c779ee6820b SHA-256: d120e807c7d22949b56e58b4d1e21e36e9869381dfeb9bac4f0db83dbc76d432
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=effective+java+3rd+pdf+github'. This URL is presented within the document body, disguised as a link to a PDF related to 'Effective Java 3rd edition'. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites. 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=effective+java+3rd+pdf+github
    • http://files.seetheworld.tours/uploads/1/3/2/8/132815961/bawifutopite.pdf
    • http://files.nhsoulstudies.com/uploads/1/3/0/8/130814032/8347026.pdf
    • http://posirumu.jeminisbazaar.com/uploads/1/3/0/7/130775350/dimolila-joseledujit.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1025/files/characterization_activities.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/bopoweruroligi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0135/files/sozerobipujejisodevozomi.pdf
    • https://cdn.shopify.com/s/files/1/0441/0081/2952/files/xiwuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7473/9607/files/66130285978.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/telokawukikotenubi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6459/7397/files/liranokunotitimasukixozo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6302/5559/files/73752872910.pdf
    • https://cdn.shopify.com/s/files/1/0429/6340/2905/files/54311896357.pdf
    • https://cdn.shopify.com/s/files/1/0428/5127/0823/files/59255807748.pdf
    • https://cdn.shopify.com/s/files/1/0431/6486/0575/files/92974316863.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/probiotics_in_poultry_nutrition.pdf
    • https://cdn.shopify.com/s/files/1/0435/6797/2515/files/76013652447.pdf
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/24965941485.pdf
    • https://cdn.shopify.com/s/files/1/0429/2352/4259/files/ritaxibivobaveso.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_off0000c010.bin
3826247985cfdceb0da8001131ea9283e965082ed0d77b84d53cfc8a022f5ba2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC010 5604 bytes
font_01_sfnt_off0000d32f.bin
2ad2455f70ce9201c2c00314c57e0e50dce706bfc627365f2f45f497f9f6da0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD32F 15472 bytes

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