Malicious PDF — malware analysis report

Static analysis result for SHA-256 048dd5677d09bdfd…

MALICIOUS

PDF

51.0 KB Created: 2020-08-14 08:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48db874f4f031409e5919bca472f6d18 SHA-1: 26cad86a6a42de887da960f1e97d1059eceaae4e SHA-256: 048dd5677d09bdfdc4ae1ef23a7e5f445cba70dd7afe07ea7a0d6f18143cade3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one prominently pointing to a suspicious URL that is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Cholecystitis in pregnancy pdf' and the malicious URL, suggesting a lure to a potentially harmful site. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK strongly indicates malicious intent.

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.ru/wb?keyword=cholecystitis%20in%20pregnancy%20pdf
    • http://files.ps177.com/uploads/1/3/1/3/131379111/7825439.pdf
    • http://files.bpsascoutingmoncton.com/uploads/1/3/2/6/132695432/balikesozew.pdf
    • http://files.kahunaresearchgroup.org/uploads/1/3/1/4/131406732/zugeruwuvufojon.pdf
    • http://jedekulo.ashleyarussell.com/uploads/1/3/1/0/131070161/3147570.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/3278/0701/files/theory_of_continental_drift.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/mugufiwupezegotutiwizom.pdf
    • https://cdn.shopify.com/s/files/1/0430/1871/5289/files/wubovekexuvulipudul.pdf
    • https://cdn.shopify.com/s/files/1/0429/2280/3366/files/mojom.pdf
    • https://cdn.shopify.com/s/files/1/0430/4633/8709/files/volugasusikifozawaxu.pdf
    • https://cdn.shopify.com/s/files/1/0452/2229/7760/files/materiales_ceramicos_clasificacion.pdf
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/tepevo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4737/0402/files/kulegavu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/78238248912.pdf
    • https://cdn.shopify.com/s/files/1/0432/3128/1312/files/10973354202.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bba.bin
853fcf4e5fa21539cc56d0dcf20602090900b92387b4b00deeef9905a372f798		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBA 5328 bytes
font_01_sfnt_off00008dd0.bin
495bdfbd25828fc2fc8753ef86bbfdb1fb0387f6593f66da53891ebf85ffd9ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD0 10188 bytes
font_02_sfnt_off0000b0ad.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0AD 4324 bytes

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