Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f9ea5cfa92e951…

MALICIOUS

PDF

51.5 KB Created: 2020-07-26 16:01:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf47a0990592fedff3fb248d67421d03 SHA-1: 4320c8917b3c574ff0db8bcc29a23a004e8ba559 SHA-256: 95f9ea5cfa92e951ef4f42386fb76863b9e4ad0469e2dfcba87216e471d0de6e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it features a large number of external PDF links, many hosted on 'cdn.shopify.com', indicating a link farm. The ML classifier also strongly flagged this PDF as malicious. The embedded document body text appears to be corrupted or obfuscated, but the presence of a keyword like 'xayah build guide aram' suggests a potential lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.com/pify?keyword=xayah+build+guide+aram
    • http://files.ohmegasalvage.com/uploads/1/3/1/4/131437983/2379332.pdf
    • http://files.serenitysalonandspallc.com/uploads/1/3/1/4/131437561/kowupi.pdf
    • http://files.squareonegoodsco.com/uploads/1/3/2/8/132815154/tasawaz.pdf
    • http://files.rabbitandcouth.com/uploads/1/3/0/7/130775646/jadisiladuvox-tukaju-lukuveneluzas.pdf
    • http://files.economicslearningstandards.com/uploads/1/3/0/7/130775174/sagedete.pdf
    • https://cdn.shopify.com/s/files/1/0433/0602/5128/files/96287147095.pdf
    • https://cdn.shopify.com/s/files/1/0432/6490/1270/files/soxagipujosabemagegazaxet.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/lomebux.pdf
    • https://cdn.shopify.com/s/files/1/0430/4325/8522/files/kisologe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/jegijozojabagoru.pdf
    • https://cdn.shopify.com/s/files/1/0430/0010/3073/files/sujepujoxozuvatoxol.pdf
    • https://cdn.shopify.com/s/files/1/0433/3184/6296/files/gitikilegekatibobudufe.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/fujilelo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8212/0358/files/70277933334.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/mugexejodagisimux.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/55193861449.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/70525006216.pdf
    • https://cdn.shopify.com/s/files/1/0438/4138/8709/files/zadilagitibajopuxidawom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nidosavexurirevinuno.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/43257021703.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_off00008cd2.bin
047cd4090701ca15cfa75ed509ac3c1fbd55b31020099365d2362d341ccce81c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD2 4864 bytes
font_01_sfnt_off00009d50.bin
39f77a3269c4725f100cb7dfc18ff2a2935b7e3fee62297b7fb6218ec0cccf2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D50 10224 bytes