Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2f0c6915d45c21…

MALICIOUS

PDF

51.6 KB Created: 2020-08-05 18:33:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec751e55cabb3b6fd82055ca4570bafc SHA-1: 20e65602e931c3d7e90f9738f320ab54df5251af SHA-256: 0d2f0c6915d45c218bcd297f179d54598c314143b3b2276b68193c8345cc2c67
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector found by heuristics. The presence of a large number of external PDF links and the ML classifier's high confidence score indicate a malicious intent, likely an advance-fee scam or a lure to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/pify?keyword=autosar+sws+can+interface.+pdf
    • http://files.withlovezoerose.com/uploads/1/3/0/7/130775191/samixezalak_tiwavesadogewo_fuwujo_jokuwe.pdf
    • http://files.cesartechnologiesltd.com/uploads/1/3/0/8/130874691/b050a.pdf
    • http://fafizura.wildgiraffe.co/uploads/1/3/0/8/130814328/sakam_wavigezewad_teroxunebopepub_sopexav.pdf
    • http://files.ellenyerger.com/uploads/1/3/1/6/131606395/4009192.pdf
    • http://files.blessedhomecleaning.com/uploads/1/3/1/4/131483372/jutisivagazol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1765/8780/files/6685031213.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5552762143.pdf
    • https://cdn.shopify.com/s/files/1/0436/9294/9658/files/digoo_dg-_m1q_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/2746/3324/files/69304873367.pdf
    • https://cdn.shopify.com/s/files/1/0430/0744/3103/files/dasawukavi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25696514874.pdf
    • https://cdn.shopify.com/s/files/1/0430/8104/0033/files/gaxumavararis.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0503/files/xatimozetibib.pdf
    • https://cdn.shopify.com/s/files/1/0431/2960/2205/files/tibid.pdf
    • https://cdn.shopify.com/s/files/1/0434/5800/3096/files/41204915120.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6820/files/lorumolejotafinut.pdf
    • https://cdn.shopify.com/s/files/1/0432/4121/0024/files/89112835863.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_off00008bb5.bin
41619abcb4b2e7fb5ea60fdbacd452c75577964c2e1727761ec71286afa1f746		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB5 5228 bytes
font_01_sfnt_off00009dac.bin
365f965539fc92b25c330185702c75d6af225200f1593ce8f7ce3a59603bb916		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DAC 10388 bytes

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