Malicious PDF — malware analysis report

Static analysis result for SHA-256 0103879532d82bdd…

MALICIOUS

PDF

45.3 KB Created: 2020-08-14 13:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bb437648c6f384f0b443bbfe34eefb1 SHA-1: 8969e49914d2a1d9dc4b05a69f14a510d43d7e6d SHA-256: 0103879532d82bdd22cf2b14d50e5bedc55047e8741849c13111ed1fb5a5f270
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's content is designed to trick users into believing they are owed money or a prize, requiring them to click the link to proceed. The ML classifier also flagged this PDF with high confidence.

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=edmonton+journal+sports+reporter
    • http://ruxibax.upgprograms.com/uploads/1/3/0/9/130970009/9653375.pdf
    • http://files.organizingwithemily.com/uploads/1/3/2/7/132741029/donuzen_mixolofamig_xenubatoluxo_sutov.pdf
    • http://vivus.moonsiewshutters.com/uploads/1/3/1/4/131437605/banasewetedidadon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5667/6510/files/wibovuwovurokoxevi.pdf
    • https://cdn.shopify.com/s/files/1/0436/4815/5806/files/the_amityville_horror_a_true_story.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vukanuzedatijaxugevune.pdf
    • https://cdn.shopify.com/s/files/1/0436/6345/8457/files/the_cup_song_ukulele.pdf
    • https://cdn.shopify.com/s/files/1/0447/5237/1863/files/xufitab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dotedijulukamani.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41877136991.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/64363416903.pdf
    • https://cdn.shopify.com/s/files/1/0430/3542/6970/files/17063639429.pdf
    • https://cdn.shopify.com/s/files/1/0445/3348/1636/files/spinal_stenosis_physical_therapy.pdf
    • https://cdn.shopify.com/s/files/1/0433/5514/4347/files/aesop_s_fables_the_boy_who_cried_wolf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0974/4789/files/vulep.pdf
    • https://cdn.shopify.com/s/files/1/0434/7976/1061/files/befovijusirojaxosoziwex.pdf
    • https://cdn.shopify.com/s/files/1/0452/9078/2881/files/real_estate_buyout_agreement.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_off0000675e.bin
85cf7436e2fb35ddc0b43be3d890b346da3d782f46490518804c0f0c5240fe11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x675E 5140 bytes
font_01_sfnt_off000078c5.bin
c0d0349cd91db1968f083fc2d7161eacc195400196e1e0f2eefb0bd9ae824a3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C5 14452 bytes

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