Malicious PDF — malware analysis report

Static analysis result for SHA-256 9199132713166b25…

MALICIOUS

PDF

42.8 KB Created: 2020-08-17 04:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6546a18d149a3aac720edb86e0d8691 SHA-1: aa732dfd8d5c05fb3058ed3d833f1777df7804fc SHA-256: 9199132713166b25f1465f37584b0badea75e7745ae38ae2428c3c6bafa3f5de
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 pointing to 'ttraff.cc'. It also exhibits a PDF link farm, with 17 external links, many pointing to Shopify domains, but the primary redirector is the most concerning. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily corrupted, contains the malicious URL and a benign-looking URL, suggesting a lure to disguise the malicious intent. The overall pattern indicates a phishing or malware distribution attempt.

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=allow+us+to+inform+synonym
    • http://files.jesswebbart.com/uploads/1/3/2/8/132814241/zawebutorowog_mojefem_badojijidarim_fatitobematepaj.pdf
    • http://files.mgeducation.net/uploads/1/3/1/4/131406391/dorit.pdf
    • http://files.berodinwaxcanada.com/uploads/1/3/0/7/130776386/fegufi.pdf
    • http://files.hanorsgoldendoodlefamily.com/uploads/1/3/1/3/131380177/ligosili.pdf
    • https://cdn.shopify.com/s/files/1/0435/0024/1061/files/boatbuilding_with_plywood_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/61557078116.pdf
    • https://cdn.shopify.com/s/files/1/0429/8620/9439/files/administrative_management_book.pdf
    • https://cdn.shopify.com/s/files/1/0440/4042/1541/files/python_print_2_decimal_places.pdf
    • https://cdn.shopify.com/s/files/1/0441/3780/8024/files/xudasomirike.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/soreluseloxajakikolo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/17134544385.pdf
    • https://cdn.shopify.com/s/files/1/0437/7303/4657/files/zusubukunopurakonimege.pdf
    • https://cdn.shopify.com/s/files/1/0429/2096/8351/files/pediatric_anesthesia.pdf
    • https://cdn.shopify.com/s/files/1/0440/4648/3606/files/29458843354.pdf
    • https://cdn.shopify.com/s/files/1/0447/9103/8118/files/bunting_flags_vector_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/6974/2999/files/25661986223.pdf
    • https://cdn.shopify.com/s/files/1/0434/1153/8072/files/crouton_for_chromebook.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cc5.bin
e3382de542e056346ae4ab5b1cf52cbe6621d3cd2e7cc88400a77dcdcd28c7fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC5 4648 bytes
font_01_sfnt_off00006c7f.bin
f8efcf25553c745d006c5284d268cdbde769ad61c349731d75f45703b5f746c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7F 10236 bytes
font_02_sfnt_off00008f71.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F71 4324 bytes

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